20959

Cesium carbonate

puriss. p.a., ≥99.0%

• Sinonimo/i: Carbonic acid dicesium
• Formula condensata: Cs₂CO₃
• Numero CAS: 534-17-8
• Peso molecolare: 325.82
• Beilstein: 4546405
• Numero CE: 208-591-9
• Numero MDL: MFCD00010957
• Codice UNSPSC: 12352301
• ID PubChem: 329752061
• NACRES: NA.22

Proprietà

• Grado: puriss. p.a.
• Livello qualitativo: 100
• Saggio: ≥99.0% (T); ≥99.0%
• Impurezze: ≤0.002% total nitrogen (N)
• Punto di fusione: 610 °C (dec.) (lit.)
• Anioni in tracce: chloride (Cl^-): ≤20 mg/kg; sulfate (SO₄^2-): ≤50 mg/kg
• Cationi in tracce: Ca: ≤10 mg/kg; Cd: ≤5 mg/kg; Co: ≤5 mg/kg; Cr: ≤5 mg/kg; Cu: ≤5 mg/kg; Fe: ≤5 mg/kg; K: ≤50 mg/kg; Mg: ≤5 mg/kg; Mn: ≤5 mg/kg; Na: ≤50 mg/kg; Ni: ≤5 mg/kg; Pb: ≤5 mg/kg; Zn: ≤5 mg/kg
• Stringa SMILE: [Cs+].[Cs+].[O-]C([O-])=O
• InChI: 1S/CH2O3.2Cs/c2-1(3)4;;/h(H2,2,3,4);;/q;2*+1/p-2; FJDQFPXHSGXQBY-UHFFFAOYSA-L

Descrizione

Descrizione generale

Cesium carbonate is an inorganic base generally used in C, N, O-arylation and alkylation reactions. It is also used in six-membered annulation, cross-coupling, intramolecular and intermolecular cyclizations, aza-Henry reaction, Horner-Emmons cyclization, and cycloaddition reactions.

Applicazioni

Cesium carbonate, an alkali metal carbonate, is a commonly used inorganic base in organic reactions.
Synthetic applications:

• As a catalyst to synthesize quinazoline-2,4(1H,3H)-diones from substituted 2-aminobenzonitriles and carbon dioxide.
• As a base to synthesize cyclic carbonates using halo- or tosyl-alcohols and carbon dioxide in the absence of any transition metal or organo catalyst.
• In combination with alkyl halide and acetonitrile, it forms an effective system for the alkylation method of phenols.

Promotes the efficient O-alkylation of alcohols to form mixed alkyl carbonates.

Informazioni sulla sicurezza

• Pittogrammi: GHS08,GHS05
• Avvertenze: Danger
• Indicazioni di pericolo: H318,H361f,H373
• Consigli di prudenza: P202 - P260 - P280 - P305 + P351 + P338 - P308 + P313 - P405
• Classi di pericolo: Eye Dam. 1 - Repr. 2 - STOT RE 2 Oral
• Organi bersaglio: Kidney,Adrenal gland,Testes
• Codice della classe di stoccaggio: 13 - Non Combustible Solids
• Classe di pericolosità dell'acqua (WGK): WGK 2
• Punto d’infiammabilità (°F): Not applicable
• Punto d’infiammabilità (°C): Not applicable
• Dispositivi di protezione individuale: dust mask type N95 (US), Eyeshields, Gloves